Ammonoosuc River at Bethlehem, NH
River level and flood forecast · Grafton County
The river is 6.8 ft below flood stage (8 ft).
Flow: 48 cubic feet per second (USGS).
Lower than normal for October 13.
Usual for October 13: 63 to 160 cubic feet per second (the middle half of 87 years).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 7 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Ammonoosuc River at Bethlehem to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 14 ft |
| Moderate flood stage | 12 ft |
| Flood stage | 8 ft |
| Action stage | 6 ft |
| Record crest (November 12, 1995) | 12.34 ft |
What floods at each level
From the National Weather Service, highest first.
- 12 ftFlood comparable to December 2023. Significant flooding of a shopping area in Littleton off Meadow Road south of I-93 exit. Water to the bottom of the Pierce Bridge in Bethlehem and property off Route 302. Flooding also occurs along portions Route 116 or Whitefield Road. Portions of Feather Lane, Wing Road, Hazen Road, and Prospect Street are flooded.
- 10 ftWater up to Wing Road south of Hazen Road. End portion of Garneau Road inundated.
- 9 ftRiver Road inaccessible from Beech Hill Road to Moose Trail Road, cutting off properties.
- 8 ftFlooding begins along River Road in the vicinity of Black Brook.
Highest crests on record
- 12.34 ft — November 12, 1995
- 12.15 ft — December 18, 2023
- 12.09 ft — October 24, 1959
- 11.96 ft — June 30, 1973
- 11.22 ft — March 27, 1953
Recent crests: 8.63 ft (April 12, 2024) · 12.15 ft (December 18, 2023) · 9.24 ft (December 24, 2022) · 9.75 ft (April 15, 2014) · 10.9 ft (August 28, 2011)
Highest flow on record
11,300 cubic feet per second — November 12, 1995. From the USGS's yearly peaks since 1940.
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (BETN3); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.